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3 points by palsecam 5532 days ago | link | parent

  (def known (words) (dedup:keep [nwords _] words))  ; lines count is now 12

  (def correct2 (word (o f [nwords _]))
    (most f 
      (or (known:list word) (known:edits1 word) (known:edits2 word) (list word))))
Or:

  (def correct3 (word (o f [nwords _]))  ; don't need 'known, but require aspirin
    (most f (or ((apply orf (map [fn (w) (dedup:keep [nwords _] (_ w))]
                              (list list edits1 edits2)))
                   word) (list word))))

  arc> (correct{2/3} "yellow")
  yellow
  arc> (correct{2/3} "godd")
  good
  arc> (correct{2/3} "speling")
  spelling
  arc> (correct{2/3} "unnkknnoown")
  unnkknnoown
Not exactly the same results than Norvig's version (>>> correct("speling") -> "sling" / "godd" -> "god") but I tested the Ruby version linked on his site, and it yields the same results. Note that the result for "speling" is not really good in canonical version. Maybe it's because the order on Python sets is different from the one in Ruby/Arc lists. I should port the test program of Norvig to stop worrying, but it's OK for now. For now, let's say this version is better than the Norvig's one (!!!)

Bonus: performance is better on average.

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EDIT:

1. also need to be clarified:

* (range 0 (- (len word) 1)) VS (range 0 (len word))

* the need or not of (known:list word)

2. A revised version for the language with the happiest users (according to... Twitter :-D, see http://blog.doloreslabs.com/2009/05/the-programming-language... FTR) is left as an exercice to the reader. Hey it's an Arc forum here, not a Perl one ;-)!

3. In the same vein, could be interesting to solve the Euler Project (http://projecteuler.net/) in Arc. I think zck has done some work in this area (http://news.ycombinator.com/item?id=837030).



1 point by s-phi-nl 5518 days ago | link

When I run Norvig's version, I do not get the results you do, but get the same results as you get from the Ruby/Arc versions.

  >>> spell.correct('speling')
  'spelling'
  >>> spell.correct('godd')
  'good'

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